1945624161 has 24 divisors (see below), whose sum is σ = 2812437696. Its totient is φ = 1195871040.

The previous prime is 1945624159. The next prime is 1945624199. The reversal of 1945624161 is 1614265491.

It is a Wieferich number.

It is not a de Polignac number, because 1945624161 - 2¹ = 1945624159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1945624141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 552396 + ... + 555906.

It is an arithmetic number, because the mean of its divisors is an integer number (117184904).

Almost surely, 2^1945624161 is an apocalyptic number.

It is an amenable number.

1945624161 is a deficient number, since it is larger than the sum of its proper divisors (866813535).

1945624161 is a wasteful number, since it uses less digits than its factorization.

1945624161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633 (or 4620 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 1945624161 is about 44109.2298844584. The cubic root of 1945624161 is about 1248.3977681733.

The spelling of 1945624161 in words is "one billion, nine hundred forty-five million, six hundred twenty-four thousand, one hundred sixty-one".